Bailey, S. W. Formerly, Department of Geology, University of Wisconsin, Madison, Wisconsin.
- Additional Readings
One of a group of layer silicate minerals, usually green in color, characterized by a perfect cleavage parallel to (001). The cleavage flakes are flexible but inelastic, with a luster varying from pearly or vitreous to dull and earthy. The hardness on the cleavage is about 2.5. The specific gravity varies between 2.6 and 3.3 as a function of composition.
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